I draft big trucks on occasion. Nothing like NASCAR wanna-be's, but I do it when an opportunity arises and I see that the coast is clear. However, some rules apply: -Never draft dangerously. -NEVER bother the big truck driver. -Don't get greedy. -It isn't always a good thing to do. Know when to say when. Tips: -Use the small screen 5 min consumption tool to watch the current mpgs. The current mpgs will fluctuate up and down with the wind and will rise precipitously when you enter The Pocket. -There will be some buffeting as you approach the pocket. This is where the air from either side of the truck merge again. -The position of the pocket will vary with wind speed and direction. It may be behind the truck, or to either side of it. You may not be able to enter it. It may be too close for safety. Or, it may be much farther back than you imagined. -Trucks usually travel approximately the same speed for extended periods. They speed up and slow down according to hills and wind. Often, you can use your cruise control and adjust one/two mph at a time to keep in the pocket. -Do not get closer than 10 car lengths or close enough to where you lose sight of the trucks mirrors. -Do not bother the driver or freak him/her out. You are a partner on the highway, and the driver already has enough to do without worrying about some crazy hyper-miler. The pocket is a fickle thing. A will-o-the-wisp. It will occasionally tolerate you, but it can also lure you to your doom. Always be wary and attentive. Did I mention not to bother the driver? I don't advocate drafting anything, anywhere. But if you think you're good enough to try, try to do it correctly and with the truck driver foremost in your thoughts. Some experts have different ideas. These are mine. YMMV. Avoid where prohibited. Happy motoring.